Features: 1) Super capacity: our sudoku game include built-in 1,000,000 puzzles 2) Super big LCD: 8(H) x 5(W)cm, big LCD 3) Gives you a right digit only 3 times 4) Review answers function 5) Standard answer prompts function 6) Answer make-up test 7) Three modes: time / date display, alarm, game 8) E-saving pattern 9) Five levels and programs can be chosen 10) Card dimensions: 167 x 250 x 36mm Inner packing: 3 x 32pcs/ctn Carton dimensions: 430 x 450 x 175mm Weight: 118g Outer packing: Structural dimensions: 139 x 90.5 x 25mm Carton dimensions: 445 x 460x 550mm N.W.: 16.50kg G.W.: 19.50kg